CN108250767A

CN108250767A - It is a kind of for modified asphalt material of road and preparation method thereof

Info

Publication number: CN108250767A
Application number: CN201611238599.8A
Authority: CN
Inventors: 岑祚师
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-28
Filing date: 2016-12-28
Publication date: 2018-07-06

Abstract

The invention discloses a kind of for modified asphalt material of road and preparation method thereof.The modified pitch is by matrix pitch and SBS, polysulfide sulphur, nano-TiO₂Powder modifying agent forms.Its specific preparation method is：A certain amount of matrix pitch raw material is first heated into melting dehydration, asphalt stock is poured into agitator tank after stopping heating and adds in polysulfide sulphur and SBS modifier, then increase temperature, high speed shear is then carried out, adds nano-TiO after shearing again₂Powder modifying agent continues shearing a period of time, up to a kind of modified asphalt material after cooling down and placing later.

Description

It is a kind of for modified asphalt material of road and preparation method thereof

Technical field

The present invention relates to a kind of road asphalt material, more particularly to a kind of addition nano-TiO₂The pitch material of powder modifying agent Material and its preparation process, belong to pitch manufacture field.

Background technology

Constantly increase with the ratio of heavy vehicle, the highway and machine using traditional material, traditionally designed The service life of the bituminous paving of field runway will constantly reduce.In order to improve the properties of product of pitch, a feasible method is exactly to change Become the characteristic of traditional asphalt so that pitch has more excellent performance.

The dark brown complex mixture that pitch is made of the hydrocarbon and its non metallic derivatives of different molecular weight. Asphalt modification has become the hot issue of countries in the world today, and early in 1873, British Samuel Whiting just applied The patent of rubber modified asphalt.The bituminous paving for mixing rubber has been built by France within 1902.With the development of highway communication cause, change Property pitch is more and more widely used.However, most polymers asphalt modifier, be all not easy it is compatible with pitch, and It is easy to aging, special equipment and higher energy consumption are needed, and construction workability is poor.SBS belongs to most common asphalt modification One of agent, it is styrene-butadiene-styrene triblock copolymer, polystyrene chain segment and polybutadiene segments in SBS Two phase structure is significantly presented, polybutadiene is continuous phase, and polystyrene is dispersed phase, makes it have 2 glass transition temperatures Degree, end group polystyrene, which flocks together, between Tg1-Tg2 to form microcell and is scattered between polybutadiene continuous phase, plays object Reason crosslinking, fixed segment, vulcanization enhancing and the effect of anti-cold flow, but single modifying agent can only improve the single performance of pitch.

The present invention is using matrix pitch as raw material, in process engineering, in addition to addition SBS modifier and poly- sulfur modifier it Outside, nano-TiO is also added₂Powder, nano-TiO₂It is a miscible process of physics that powder, which is added to pitch, nano-TiO₂With pitch Between only exist a kind of intermolecular force, there is no chemical change occurs to generate new substance or group.But due to nanometer TiO₂It is minimum with grain size so that miscible system is uniformly and stable, and suitable for production application, the comprehensive performance of pitch obtains greatly It improves.

Invention content

The object of the present invention is to provide a kind of modified pitch, the preparation method of the modified pitch carries out as follows：

(1) a certain amount of matrix pitch raw material is first taken, and heating melting dehydration is carried out to it；

(2) after being dehydrated, i.e., not in bubbling, stop heating immediately, rapidly pour into the asphalt stock of heating in one agitator tank；

(3) suitable polysulfide sulphur and SBS modifier are added into agitator tank again, increases system temperature, and use high cut disperse emulsification Machine is under certain rotating speed, shearing a period of time；

(4) and then suitable nano-TiO is added₂Powder continues shearing a period of time；

(5) carry out after mixing, being cooled to certain temperature and dripping for the modified of road to get a kind of after placing a period of time Green material.

As the present invention preferred embodiments, step (1) in, heating temperature be 140-180 DEG C.

As the present invention preferred embodiments, step (3) in, the additive amount of sulphur accounts for the 3-5% of matrix pitch weight.

As the present invention preferred embodiments, step (3) in, the additive amount of SBS accounts for the 3-5% of matrix pitch weight.

As the present invention preferred embodiments, step (3) in, heating temperature be 170-190 DEG C.

As the present invention preferred embodiments, step (3) in, high-shearing dispersion emulsifying machine rotating speed is set as 3000- 5000r/min, shear time 0.5-1h.

As the present invention preferred embodiments, step (4) in, nano-TiO₂The additive amount of powder accounts for matrix pitch weight 3-5%.

As the present invention preferred embodiments, step (5) in, be cooled to 140-160 DEG C, standing time 0.5-1h.

The present invention has following advantages and characteristic：

(1) preparation process is simple, at low cost；

(2) flow time is short, easily mass produces.

Specific embodiment

Embodiment one：

The matrix pitch raw material of 10kg is first taken, and is heated to 140 DEG C and carries out melting dehydration, when pitch stops bubbling, is stopped It only heats, and pitch is poured into an agitator tank, then the SBS of the sulphur of addition 0.3kg and 0.3kg into agitator tank, increase body Be temperature to 170 DEG C, and with high-shearing dispersion emulsifying machine in the case where rotating speed is 3000r/min, shear 1h, then add 0.3kg again Nano-TiO₂Powder continues shearing 1h and is mixed, and system then is cooled to 140 DEG C and places 1h up to a kind of for road The modified asphalt material on road.

Embodiment two：

The matrix pitch raw material of 20kg is first taken, and is heated to 160 DEG C and carries out melting dehydration, when pitch stops bubbling, is stopped It only heats, and pitch is poured into an agitator tank, then the SBS of the sulphur of addition 0.8kg and 0.8kg into agitator tank, increase body Be temperature to 180 DEG C, and with high-shearing dispersion emulsifying machine in the case where rotating speed is 4000r/min, shear 0.7h, then add 1 kg again Nano-TiO₂Powder continues shearing 0.7h and is mixed, system then is cooled to 150 DEG C and places 0.7h up to a kind of use In the modified asphalt material of road.

Embodiment three：

The matrix pitch raw material of 50kg is first taken, and is heated to 180 DEG C and carries out melting dehydration, when pitch stops bubbling, is stopped It only heats, and pitch is poured into an agitator tank, then the SBS of the sulphur of addition 2.5kg and 2.5kg into agitator tank, increase body Be temperature to 190 DEG C, and with high-shearing dispersion emulsifying machine in the case where rotating speed is 5000r/min, shear 05h, then add 2.5kg again Nano-TiO₂Powder continues 0.5 h of shearing and is mixed, and system then is cooled to 160 DEG C and places 0.5h up to a kind of For the modified asphalt material of road.

Claims

1. a kind of preparation method of modified asphalt material for road, it is characterised in that the preparation method as follows into Row：

2. the preparation method of a kind of modified asphalt material for road as described in claim 1, which is characterized in that in step (1) in, heating temperature is 140-180 DEG C.

3. the preparation method of a kind of modified asphalt material for road as described in claim 1, which is characterized in that in step (3) in, the additive amount of sulphur accounts for the 3-5% of matrix pitch weight.

4. the preparation method of a kind of modified asphalt material for road as described in claim 1, which is characterized in that in step (3) in, the additive amount of SBS accounts for the 3-5% of matrix pitch weight.

5. the preparation method of a kind of modified asphalt material for road as described in claim 1, which is characterized in that in step (3) in, heating temperature is 170-190 DEG C.

6. the preparation method of a kind of modified asphalt material for road as described in claim 1, which is characterized in that in step (3) in, high-shearing dispersion emulsifying machine rotating speed is set as 3000-5000r/min, shear time 0.5-1h.

7. the preparation method of a kind of modified asphalt material for road as described in claim 1, which is characterized in that in step (4) in, nano-TiO₂The additive amount of powder accounts for the 3-5% of matrix pitch weight.

8. the preparation method of a kind of modified asphalt material for road as described in claim 1, which is characterized in that in step (5) in, 140-160 DEG C is cooled to, standing time 0.5-1h.